Sheet Postprocessing Apparatus and Sheet Postprocessing Method
a postprocessing apparatus and postprocessing technology, applied in the direction of thin material processing, printing, filing appliances, etc., can solve the problems of high possibility of bringing about the above-described error, formation of the apparatus, and increased cos
Active Publication Date: 2008-03-27
MAX CO LTD
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- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
[0005] According to one or more embodiments of the invention, in a constitution of aligning a sheet attached
Problems solved by technology
When the sheets attached with the punch holes are aligned by the reference of the punch hole by inserting the pin driven by a motor, a solenoid or the like through the punch hole of the sheets attached with the punch holes, when a positional shift of the punch hole of the sheets is large, there is a case in which the pin cannot penetrate through the punch hole, a pin drive mechanism is stopped in the midst of a stroke to bring about an error.
Particularly, when a number of the sheets is large, or a thick sheet is loaded as a cover, a load of sliding the pin and the punch hole relative to each other is large and therefore, there is a high possibility of bringing about the above-described error.
When the motor, the solenoid or the like is made to be strong such that the pin drive mechanism is not stopped in the midst of the stroke, a problem of large-sized formation of the apparatus or an increase in cost is posed, or there can be brought about a case in which the pin penetrates through the punch hole in a state of shifting the position of the punch hole to deform the punch hole or bring about a crack.
Method used
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embodiment 1
[0075]FIG. 1 and FIG. 2 show a bind processing apparatus 1 for mounting a ring binder to sheets attached with punch holes to bind as an example of a sheet postprocessing apparatus. A roller R shown at a topmost portion in FIG. 1 is a sheet discharging roller of a copier, a punching apparatus or the like at a prestage, and a sheet fed by the sheet discharging roller R is moved down in a skewed lower direction along a sheet guide 2 to reach a sheet feeding roller 3. A sheet detecting sensor 4 is arranged immediately before the sheet feeding roller 3, and 1 cycle of a binding processing comprising sheet aligning and binder mounting is carried out from when the sheet detecting sensor 4 detects the sheet. The sheet drawn by the sheet feeding roller 3 is dropped by its own weight by being guided onto a sheet table 7 by a sheet guide 6 at inside of a sheet guide unit 5, and is brought into contact with a sheet front end position restricting plate 9 of a front face (an upper face in the dra...
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There is provided a sensor 48 for detecting penetration of a sheet by a punch hole aligning pin 42, and there is provided controlling means for retrying a penetrating operation by returning the punch hole aligning pin to an initial position when a time period from starting to move the pin to penetrating the sheet exceeds a reference time period. Even when a degree of unalignment of the punch hole of the sheet P is considerable and the punch hole aligning pin cannot penetrate through the sheet by once, the punch hole aligning pin is penetrated therethrough frequently by repeating the penetrating operation and therefore, an error in aligning the sheet can be reduced. In a case in which the pin is not penetrated through the sheet even when the penetrating operation is carried out by a predetermined number of times, the pin is returned to the initial position and an error is displayed.
Description
TECHNICAL FIELD [0001] The present invention relates to a sheet postprocessing apparatus and a sheet postprocessing method having a function of aligning punch holes of a bundle of sheets attached with the punch holes. BACKGROUND ART [0002] There is a sheet postprocessing apparatus for carrying out a staple binding processing or a processing of mounting a binder or the like for sheets subjected to a processing of copying, forming punch holes or the like. JP-A-2003-160273 discloses a sheet postprocessing apparatus for carrying out a processing of binding staples by accurately aligning punch holes of a bundle of sheets attached with the punch holes. According to the sheet postprocessing apparatus of JP-A-2003-160273, the bundle of sheets attached with the punch holes are positioned to align by a reference of the punch hole by inserting a pin into the hole bored at the sheets and the staple binding processing is carried out in a state of inserting the pin thereto. [0003] When the sheets...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B42C13/00
CPCB65H31/34B65H2511/52B65H2513/53B65H2701/1212B65H2220/03B65H2220/01B65H2513/52B65H31/00B65H37/04B42F13/00
InventorBABA, KAZUAKIKURABAYASHI, ATSUSHIYOSHIE, TORU
OwnerMAX CO LTD